Future upgrades:Garrett VNT turboIntercooler water spray bar (may not need this with water/meth, need to do some testing)fabricate air box for a high flow filter and snorkelDiff ratio changesUpgrade front brakes

CheersPaul

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Last edited by paulthepilot5 on Thu Aug 23, 2018 7:33 pm, edited 1 time in total.

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Looks nce. Couple of things though. The breather pipe at the back of the rocker cover. If you dont run that into the intake before the turbo (possibly with a catch can) the engine will not be clean for long. Also that manifold might be great for ultimate power but does it cause turbo lag? Its a big volume to fill up before the turbo can really boost

Sanding your knuckles before starting work can help. That way you cant skin them

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geeves wrote:Looks nce. Couple of things though. The breather pipe at the back of the rocker cover. If you dont run that into the intake before the turbo (possibly with a catch can) the engine will not be clean for long. Also that manifold might be great for ultimate power but does it cause turbo lag? Its a big volume to fill up before the turbo can really boost

Hi Geeves.Not running without a draft pipe on the rocker cover breather, photo was taken while it was removed. Turbo lag is not an issue, the volume of the manifold is not that much greater than the stock one, any affect of lag is probably only in the order of milliseconds and not noticeable.

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How much boost are you running now? Do you get crazy high EGT’s with this setup?

Running 24psi, but this bumps up to about 27 with water/meth on. Hi way driving at 110kph sits on around 280c pre-turbo EGT. Holding it flat till it runs out of revs in 5th will see it get to about 600c pre turbo. Towing a 2000kg trailer on the highway climbs to about 350c, on a good uphill part around 550c. If you held it flat with a trailer for long enough you could cook it but getting from zero to highway speeds won’t do it.

Running water methanol in a standard 50/50 mix with reduce egt’s. If you start playing with stronger mixes of methanol then that can increase them

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Sounds like an interesting setup- I have done a lot of mods to my 4jb1T, running 16psi but my egts are higher than yours. The Intercooler water spray bar you talk about is most likely the difference- any chance you could load up some pictures of this?

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SamMu93 wrote:Sounds like an interesting setup- I have done a lot of mods to my 4jb1T, running 16psi but my egts are higher than yours. The Intercooler water spray bar you talk about is most likely the difference- any chance you could load up some pictures of this?

Hi,The water/methanol setup I am using is not an intercooler spray bar, but an injection of water and methanol mix post intercooler into the induction. It takes a significant amount of heat out of the compressed intake air. The methanol burns, and water vaporises during combustion cycle. Lower combustion temps and egt are a result, there is also a noticable pickup in turbo spool up to probably due to greater of exhaust gases/steam. The drop in EGT is not massive probably 50-100degrees at most depending on conditions. The boost pressure I’m running is probably a greater factor in EGT,s

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geeves wrote:Looks nce. Couple of things though. The breather pipe at the back of the rocker cover. If you dont run that into the intake before the turbo (possibly with a catch can) the engine will not be clean for long. Also that manifold might be great for ultimate power but does it cause turbo lag? Its a big volume to fill up before the turbo can really boost

Hi I was just confused by this. I thought it was better to do away with breather pipe going into inlet pipe to avoid the smokey hot air. I'm just wondering how to have my catch can, at the moment I have my rocker cover breather pipe going into a catch can that drips into sump. I have 2 openings ontop of the catch can, the second opening used to be plumed into inlet pipe and overboost valve. Now it just hangs open spewing smoke into engine bay. I have quite abit of blow by on my 4jb1 but goes away upon reving.

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From the original post it was removed for the photo. There are two ways of doing the breather. If you engine has a lot of blow by then a catch can is a must but after that it would normally be routed back into the inlet before the turbo. Alternately it can be free to air but it will always smell and it must be set up properly to work. Im not sure if it meets wof standards though. Race cars always vent to air as recycling fumes robs power. However they have rules about the size and construction of the catch can

Sanding your knuckles before starting work can help. That way you cant skin them

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geeves wrote:Looks nce. Couple of things though. The breather pipe at the back of the rocker cover. If you dont run that into the intake before the turbo (possibly with a catch can) the engine will not be clean for long. Also that manifold might be great for ultimate power but does it cause turbo lag? Its a big volume to fill up before the turbo can really boost

Hi I was just confused by this. I thought it was better to do away with breather pipe going into inlet pipe to avoid the smokey hot air. I'm just wondering how to have my catch can, at the moment I have my rocker cover breather pipe going into a catch can that drips into sump. I have 2 openings ontop of the catch can, the second opening used to be plumed into inlet pipe and overboost valve. Now it just hangs open spewing smoke into engine bay. I have quite abit of blow by on my 4jb1 but goes away upon reving.

As geeves said, a catch can is a must if it has a lot of blow by and you want to vent back to intake. I’ve seen turbo compressor wheels erroded away from heavy oil mist when vented to intake (in only a few months operation). I will eventually put a catch can on my system but will still be vented to atmosphere. Just depends how much you want to play buy the rules

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An update on the Ute. I upgraded the turbo recently to a TD04L with a 46/58billet compressor wheel. Now able to get 37psi boost, and making 148kw at the wheels. Took her to the drags again shortly after the upgrade and ran a 14.8 quarter and 90.4 Mph. Pretty happy with the result